New tool to set active layer when selecting features

• adds a new tool to set active layer by clicking features on map
• if multiple layers are found, active layer is chosen in this order: point layer, line layer, polygon layer, other map layers

Refactored with qgis_plugin_tools

• perform spatial operation on selected feature
• fix bugs: custom actions, copying features
• reformat using black, isort and flake8
• refactor to use qgis_plugin_tools
• add CI and CD pipelines